A257731 - cp's OEIS frontend

A257731 Permutation of natural numbers: a(1) = 1, a(prime(n)) = lucky(1+a(n)), a(composite(n)) = unlucky(a(n)), where prime(n) = n-th prime number A000040, composite(n) = n-th composite number A002808 and lucky = A000959, unlucky = A050505.

n	a(n)
1	1
2	3
3	9
4	2
5	33
6	5
7	7
8	14
9	4
10	45
11	163
12	8
13	15
14	11
15	20
16	6
17	25
18	59
19	63
20	203
21	12
22	22
23	13
24	17
25	28
26	10
27	35
28	78
29	235
30	83
31	1093
32	251
33	18
34	30
35	19
36	24
37	31
38	39
39	16
40	47
41	67
42	101
43	43
44	290
45	107
46	1283
47	87
48	309
49	26
50	41
51	27
52	34
53	21
54	42
55	53
56	23
57	61
58	88
59	115
60	128
61	321
62	57
63	354
64	137
65	1499
66	112
67	349
68	376
69	36
70	55
71	1401
72	38
73	49
74	46
75	29
76	56
77	70
78	32
79	99
80	81

[1, 3, 9, 2, 33, 5, 7, 14, 4, 45, 163, 8, 15, 11, 20, 6, 25, 59, 63, 203, 12, 22, 13, 17, 28, 10, 35, 78, 235, 83, 1093, 251, 18, 30, 19, 24, 31, 39, 16, 47, 67, 101, 43, 290, 107, 1283, 87, 309, 26, 41, 27, 34, 21, 42, 53, 23, 61, 88, 115, 128, 321, 57, 354, 137, 1499, 112, 349, 376, 36, 55, 1401, 38, 49, 46, 29, 56, 70, 32, 99, 81]

cp's OEIS Frontend

A257731 Permutation of natural numbers: a(1) = 1, a(prime(n)) = lucky(1+a(n)), a(composite(n)) = unlucky(a(n)), where prime(n) = n-th prime number A000040, composite(n) = n-th composite number A002808 and lucky = A000959, unlucky = A050505.

Table of values

List of values